PowerStop B340 Drum Brake Shoe - Rear

PowerStop B340 Rear Drum Brake Shoes

PowerStop B340 Autospecialty brake shoes are built for rear drum brake service with a semi-metallic friction formula and OEM-focused fitment. They are made for 1961-1970 Buick LeSabre and 1963-1970 Buick Riviera rear applications with 12x2 inch brakes.

Autospecialty Brake Shoe Line

The PowerStop Autospecialty brake shoe line is centered on precision fit, consistent friction, and reduced noise. For Buick LeSabre and Buick Riviera rear drum brake service, this line uses post-cured friction material to support stronger initial braking response and a shorter break-in period.

Key Features

• Semi-metallic friction material for rear drum brake service
• Post-cured lining for improved braking response and shorter break-in time
• Precision cam ground for drum fitment
• Chamfered edges to help reduce noise and chatter
• 100% asbestos-free and copper-free construction
• New steel backing coated to resist rust
• Riveted friction material attachment
• Mounting hardware not included

Detailed Description

PowerStop B340 is a rear drum brake shoe set engineered to meet strict OEM standards for fit and function. The semi-metallic lining is post cured for consistent performance, while the cam-ground profile helps the shoe seat properly against the drum. Chamfered edges further support quiet operation in rear drum brake systems on Buick LeSabre and Buick Riviera models.

This part cross-references Centric Parts 111.03400 for the same application. It is also listed as a replacement for Raybestos Brakes 340PG and Wagner Brake Z340.

Common Problems This Part Can Address

• Rear brake noise or chatter during drum brake operation
• Uneven shoe-to-drum contact from worn friction surfaces
• Reduced braking response from aged rear drum shoes
• Rust-related backing plate deterioration on older brake components
• Fitment issues when replacing worn rear shoes on 12x2 inch drum systems

Installation Notes and Tips

• Compatible With 1961-1970 Buick LeSabre, rear, bonded; with 12x2 inch brakes.
• Compatible With 1963-1970 Buick Riviera, rear, bonded; with 12x2 inch brakes.
• Inspect drums, wheel cylinders, return springs, and adjusters before installation.
• Because mounting hardware is not included, reuse only serviceable components or replace worn brake hardware separately.
• Follow proper drum brake adjustment and bedding procedures after installation.

Quality Assurance

PowerStop builds this brake shoe line to OEM-level standards using asbestos-free, copper-free materials and rust-resistant coated steel. The B340 is part of the Autospecialty range, which focuses on precise fitment and consistent rear drum brake performance.